cl
imageadd: New icon for plastic flaps that actually looks airtight.
code: Update to plastic flaps code to use tool procs rather than attackby and removed two pointless states.
/cl
Gives plastic flaps an airtight look to fit their new property. Removes two defines that were just a functional copy of anchored. Replaces calls to attackby() with screwdriver_act() and wirecutter_act().
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